High blood pressure is often due to a lack of specific minerals, Calcium, Magnesium and Potassium, etc. I recommend ORGANIC dairy and fruits/fresh pressed fruit juice over supplements.

Excess estrogen suppresses the thyroid, progesterone is needed to balance estrogen. Is your daughter's menst. cycle regular?

"The loss of control over the water in the body is the result of energy failure, and hypertension is one of the adaptations that helps to preserve or restore energy production.”

“Stereotypes are important. When a very thin person with high blood pressure visits a doctor, hypothyroidism isn’t likely to be considered; even high TSH and very low T4 and T3 are likely to be ignored, because of the stereotypes. (And if those tests were in the healthy range, the person would be at risk for the “hyperthyroid” diagnosis.) But remembering some of the common adaptive reactions to a thyroid deficiency, the catabolic effects of high cortisol and the circulatory disturbance caused by high adrenaline should lead to doing some of the appropriate tests, instead of treating the person’s hypertension and “under nourished” condition.” -RAY PEAT PhD.

https://www.functionalps.com/blog/2012/09/21/ray-peat-phd-on-high-blood-pressure/